If you choose to execute maintenance tasks for your Kawasaki Voyager XII then it is usually a good plan to have access to a Workshop Manual for a guide in case that you want to know tips on how to strip off a specific part for example the Door and fit it again appropriately.
Kawasaki Voyager XII Workshop Manuals will provide you with specific diagnostic wisdom with regards to your vehicle so if something is broken it helps you ascertain what the problem is and how you can resolve it. You can then determine if this can be done by yourself or that the job is simply too big you could book your Voyager XII into a suitable repair garage.
Kawasaki Voyager XII manual